Bottom and top caps for 70 mm OD, 64 mm ID Minirhizotron tubes. Other dimension can be sourced together with MR Tubes / MR Camera Systems. Sets include one bottom cap and one top cap. Variants for VSI MS-190 (manual) and AC-21 (automatic) Minirhizotron camera systems exist: AC-21 bottom caps have a POM inset (white in images) to guide the automatic MR camera during rotation. Bottom caps must be glued into MR tube ends (i.e. the side without camera positioning hole!) to seal.
